I don't usually consider RT to be a reliable source, but this article is a summary of one in German[0], co-authored by Jacob Appelbaum. An interest in Tor is

I don't usually consider RT to be a reliable source, but this article is a summary of one in German[0], co-authored by Jacob Appelbaum. An interest in Tor is not the only way to make it to NSA’s watch list. Even web searches for other encryption software makes you a target as well, the report said. Disturbingly, NSA programmer comments in the source code label those picked up by the American system “extremists.” [0] http://www.tagesschau.de/inland/nsa-xkeyscore-100.html http://www.tagesschau.de/inland/nsa-xkeyscore-100.html